PISTON KIT 01-04 YZF250 77.00, 8572DC WOSSNER 2-RING
4.1 Trustpilot 99.9% positive on eBay
Delivery to United States 5–8 business days
Spread the cost with 
Wossner 2-ring forged piston kit with a 77.00mm bore and 77.02mm piston size. Designed for superior strength and performance with optimized heat transfer. The elliptical design ensures uniform bearing surface under heat expansion, preventing piston collapse and distributing thrust loads evenly. Manufactured in Germany. Features include forged construction, optimized heat transfer, elliptical design, and Pro Series with a two-ring configuration. Specifications: Bore 76.98mm, Piston Size 77.02mm, Displacement 249 cm³, Stroke 53.60mm, Clearance 0.04mm, Wossner Compression Ratio 12.80:1, OEM Compression Ratio 12.50:1, Dome Volume -4.80 cm³, Compression Height 20.50mm. Cross-reference OEM part numbers: Lock CW16, Pin WP059, Ring Set 770XAS, Rod P4006 / P4005. Weight 258g.
- SKU
- 56-W022+00C.WO
- Brand
- Wossner
- Availability
- In Stock (1)
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- Variant Id
- 254288
FULL DESCRIPTION
Wossner Forged Piston Kit - Pro Series 2-Ring
Upgrade your engine's performance and durability with this Wossner forged piston kit. Precision-engineered in Germany, this Pro Series piston is designed for superior strength and optimal heat transfer, ensuring consistent power delivery and longevity. Its advanced elliptical design effectively manages heat expansion, preventing localized pressure and distributing thrust loads evenly to avoid piston collapse.
Key Features:
- Forged construction for exceptional durability and strength
- Engineered for efficient heat transfer from the combustion chamber to cylinder walls
- Elliptical piston design ensures uniform bearing surface under heat expansion, preventing localized pressure and piston collapse
- Pro Series design with a two-ring configuration for enhanced sealing and extended lifespan
Specifications:
- Bore: 76.98 mm
- Piston Size: 77.02 mm
- Displacement: 249 cm³
- Stroke: 53.60 mm
- Clearance: 0.04 mm
- Wossner Compression Ratio: 12.80:1
- OEM Compression Ratio: 12.50:1
- Dome Volume: -4.80 cm³
- Compression Height: 20.50 mm
Included Components:
- Lock: CW16
- Pin: WP059
- Ring Set: 770XAS
- Rod: P4006 / P4005
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00 (UK time).
Call or email us with your make, model and year and we will check it for you before you order.
Yes. We ship from the UK. Orders ship within 3 working days, then delivery to the United States takes 5–8 business days. The delivery price is shown at checkout before you pay. Delivery details
Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy
By card, PayPal, Apple Pay or Google Pay, or spread the cost with Klarna. Payment is taken securely by Stripe, and the options for your order are shown at checkout.
Any customs duties or import taxes charged in the United States are paid by you when the parcel arrives. Any tax we collect ourselves is shown at checkout before you pay.
More answers in our FAQ.
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.